content/media/webaudio/test/test_bug956489.html@6474c204b198 (annotated)
content/media/webaudio/test/test_bug956489.html
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | <!DOCTYPE HTML> |
| michael@0 | 2 | <html> |
| michael@0 | 3 | <head> |
| michael@0 | 4 | <title>Test when and currentTime are in the same coordinate system</title> |
| michael@0 | 5 | <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> |
| michael@0 | 6 | <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> |
| michael@0 | 7 | </head> |
| michael@0 | 8 | <body> |
| michael@0 | 9 | <pre id="test"> |
| michael@0 | 10 | <script class="testbody" type="text/javascript"> |
| michael@0 | 11 | |
| michael@0 | 12 | SimpleTest.waitForExplicitFinish(); |
| michael@0 | 13 | addLoadEvent(function() { |
| michael@0 | 14 | var freq = 330; |
| michael@0 | 15 | |
| michael@0 | 16 | var context = new AudioContext(); |
| michael@0 | 17 | |
| michael@0 | 18 | var buffer = context.createBuffer(1, context.sampleRate / freq, context.sampleRate); |
| michael@0 | 19 | for (var i = 0; i < buffer.length; ++i) { |
| michael@0 | 20 | buffer.getChannelData(0)[i] = Math.sin(2 * Math.PI * i / buffer.length); |
| michael@0 | 21 | } |
| michael@0 | 22 | |
| michael@0 | 23 | var source = context.createBufferSource(); |
| michael@0 | 24 | source.loop = true; |
| michael@0 | 25 | source.buffer = buffer; |
| michael@0 | 26 | |
| michael@0 | 27 | setTimeout(function () { |
| michael@0 | 28 | var finished = false; |
| michael@0 | 29 | |
| michael@0 | 30 | source.start(context.currentTime); |
| michael@0 | 31 | var processor = context.createScriptProcessor(256, 1, 1); |
| michael@0 | 32 | processor.onaudioprocess = function (e) { |
| michael@0 | 33 | if (finished) return; |
| michael@0 | 34 | var c = e.inputBuffer.getChannelData(0); |
| michael@0 | 35 | var result = true; |
| michael@0 | 36 | |
| michael@0 | 37 | for (var i = 0; i < buffer.length; ++i) { |
| michael@0 | 38 | if (Math.abs(c[i] - buffer.getChannelData(0)[i]) > 1e-9) { |
| michael@0 | 39 | result = false; |
| michael@0 | 40 | break; |
| michael@0 | 41 | } |
| michael@0 | 42 | } |
| michael@0 | 43 | finished = true; |
| michael@0 | 44 | ok(result, "when and currentTime are in same time coordinate system"); |
| michael@0 | 45 | SimpleTest.finish(); |
| michael@0 | 46 | } |
| michael@0 | 47 | processor.connect(context.destination); |
| michael@0 | 48 | source.connect(processor); |
| michael@0 | 49 | }, 500); |
| michael@0 | 50 | }); |
| michael@0 | 51 | |
| michael@0 | 52 | </script> |
| michael@0 | 53 | </pre> |
| michael@0 | 54 | </body> |
| michael@0 | 55 | </html> |
